Table 2.

Intraclass comparison of sagittal alignments from sitting to standing

Sagittal Alignments	Non-degenerative Spine			Degenerative Spine
	Sitting	Standing	p value	Sitting	Standing	p value
PT	30.9±10.9	6.5±7.4	<0.001*	29.2±12	11.6±9.1	<0.001*
SS	17±12.8	40.3±8.7	<0.001*	21.2±10.9	37.4±9.9	<0.001*
PI	47.9±11.5	46.9±10.9	0.004*	50.4±11.7	49.1±11.8	0.029**
LL	18.3±16.8	53.1±12.5	<0.001*	27.1±16.5	48.8±14.2	<0.001*
TK	23.5±11.6	28±10.9	<0.001*	32.9±14.2	32.8±13.9	0.905*
SVA	58.9±26	2.1±27.4	<0.001*	56.8±26.6	20.4±33.9	<0.001*
PFA	81.9±13.3	4.3±5.4	<0.001**	85.5±4.6	7.2±5.6	<0.001*
KF	-	0.8±6.2		-	-2.8±8.6
AF	-	5.1±3.3		-	6.8±4.4

Significance level, $\alpha$, was set at 0.05. Data were expressed as mean ± standard deviation

PT Spinopelvic tilt or pelvic tilt, SS Sacral slope, PI Pelvic incidence, LL Lumbar lordosis, TK Thoracic kyphosis, SVA Sagittal vertical axis, PFA Proximal femoral angle, KF Knee flexion angle, AF Ankle dorsiflexion angle

*p values from paired t test

**p values from Wilcoxon signed rank test